JPH02302578A - Far-infrared hot-blast grain drier - Google Patents

Abstract

PURPOSE:To improve the efficiency of thermal energy by directly heating substance for radiating an electromagnetic wave containing many far infrared rays with thermal energy to radiate the electromagnetic wave, drying the cereals to be dried, and using the waste heat of the heated substance as for drying the cereals. CONSTITUTION:Hot blast generated by the combustion of a burner 4 is brought from a heat distribution chamber 5 to hot blast passages 13, 13 thereby to heat far infrared ray radiator 14 to generate an electromagnetic wave containing many far infrared rays. It is passed directly under the radiator 14 or through inner and outer plates 15, 16 upward, permeated into cereals to be efficiently dried. Waste heat which heats the radiator 14 and then arrives at an inlet air conditioner 7 is here mixed with the atmospheric air, passed through a passage between the plates 15 and 16 out of the plate 16, thereby drying the cereals. The electromagnetic wave containing many far infrared rays and the waste heat of the burner 14 are forcibly passed through the cereals fed down in a cereals flowdown passage 18 by the induction force of an induction fan 6 to dry the cereals.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a grain drying device for drying grain by continuously flowing it down, and particularly to a drying device with an improved drying heat source.

(Prior art) Conventional grain drying equipment generally burns kerosene in a burner, etc., immediately mixes outside air with the combustion gas to lower the temperature, and then sends it into a layer of grain flowing down to dry the grain. I have to.

(Problems to be Solved by the Invention) As described above, if the combustion gas is immediately mixed with outside air and then lowered to a low temperature before being used for drying, thermal efficiency is poor and energy loss is large.

The present invention has been made to solve the above problems.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a grain drying apparatus in which grains to be dried are allowed to flow down and a heat source for drying is provided in the flow path, and the present invention is utilized as the heat source for drying. A substance that radiates electromagnetic waves containing a lot of far infrared rays when heated by hot air is provided, and the substance is heated and emits electromagnetic waves to dry the grains to be dried, and the waste heat from heating the substance is also used to dry the grains. It is characterized by being used for.

(Function) With the above configuration, for example, thermal energy from burning kerosene is used to directly heat a substance that emits electromagnetic waves containing a large amount of far infrared rays, thereby emitting electromagnetic waves, thereby drying the grain to be dried and heating the substance. Since the waste heat is also used for grain drying, thermal energy efficiency is further improved.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a circulating grain dryer, and this grain dryer 1 has a packet elevator 3 erected on the outside of a box-shaped casing 2, and a burner 4. A heat distribution chamber 5, an induction fan 6, an inflow air adjustment section 7, etc. are provided.

Inside the casing 2, a grain storage section 8, a drying section 9, and a grain collecting section 10 are provided in order from the top. A grain distribution screw 11 is disposed in the upper part of the grain storage section 8, which communicates with the upper end of the packet elevator 3, transports the grain laterally, and distributes the grain into the grain storage section 8. The above grain collecting section 10
A grain collecting/transporting screw 12 is provided at the bottom of the elevator and communicates with the lower end of the packet elevator 3. Although not shown, the packet elevator 3 is provided with a hopper for loading grains, which loads the grains into the grain storage section 8 via the grain distribution screw 11, and collects and collects grains during drying work.
The dried grain discharged by the conveying screw I2 is sent to the grain distribution screw 11 for circulation, and furthermore, when the drying work is completed, the packet elevator 3 is switched to discharge the dried grain from the middle of the machine to the outside of the machine. It's like that.

As shown in FIG. 2, the drying section 9 has two hot air channels 13 having triangular end surfaces, one end communicating with the heat distribution chamber 5 and the other end communicating with the inflow air adjusting section 7. ,13
is provided. This hot air path 13 has a far-infrared radiator (for example, a plate made of fine ceramics) 14 on the bottom, and an inner plate 15 and an outer plate 16 on the upper side.
A double plate consisting of is provided with its lower end connected to both sides of the far-infrared radiator 14. As shown in FIG. 1, only the inner plate 15 communicates with the heat distribution chamber 5, and the end of the outer plate 16 on the heat distribution chamber 5 side is in contact with the inner surface of the casing 2. These two hot air paths I3
The upper side is open to communicate with the grain storage section 8, and the grain flow passages tg and ig are formed by the ventilation passage plate 17 from the side to the lower side, and this grain flow passage 18.1
A rotary valve 19.19 is provided at the bottom of the 8. The induction fan 6 is communicated with an air exhaust path 20 formed on the lower side of the air exhaust path plate 17 . The grains discharged from the low refill valves 19 and 19 are brought to the grain collecting and conveying screw 12.

In a grain far-infrared hot air drying device with such a configuration,
The grain to be dried is loaded into the grain storage section 8 via the grain distribution screw II by the packet elevator 3. Including grain distribution screw 11,
Burner 4. Induced fan 6° rotary valve 19. Grain collection/
By operating the conveyance screw 12 and the like, the grain to be dried is circulated through the path of grain storage section 8 - drying section 9 - grain collection section 10 - packet elevator 3 and dried. The circulation speed is mainly determined by the rotation speed of the rotary valve 19.

The hot air generated by the combustion of the burner 4 is transferred to the heat distribution chamber 5
This heat heats the far-infrared radiator 14 to generate electromagnetic waves containing a large amount of far-infrared rays, thereby drying the grains flowing down the grain flow path 18.

As shown in FIG. 2, this electromagnetic wave containing a large amount of far-infrared rays is radiated directly below the far-infrared radiator 14 or upwards through the inner plate 15 and outer plate 16, and penetrates into the grain to efficiently dry. Far infrared radiator 14
The exhaust heat that has reached the inflow air adjustment section 7 after heating is mixed with the outside air and is transferred to the inner plate 15 and the outer plate 1.
B is discharged from the outer plate 16 through a passageway between the grains and the grains to dry the grains. The electromagnetic waves containing a large amount of far infrared rays and the exhaust heat of the burner 4 are forced to pass through the grain flowing down the grain flow path 18 due to the attractive force of the induction fan 6, drying the grain, and removing moisture generated by drying. Fine dust generated by the movement of grains and grains passes through the exhaust passage plate 17 and is discharged from the induction fan 6 to the outside of the machine. Additionally, so-called tempering can be carried out freely during the drying operation.

When the drying work is completed, stop combustion of burner 4,
The circulation path of the packet elevator 3 is switched to discharge dried grains to the outside of the machine.

Note that the far-infrared radiator 14 of the above embodiment is connected to the hot air path 13.
The dryer may be provided not only on the lower surface but also at other positions, and the type of dryer is not limited to that of the above embodiment, but may be of other types.

(Effects of the Invention) As explained above, according to the grain far-infrared hot air drying device of the present invention, substances that emit electromagnetic waves containing a large amount of far-infrared rays are heated and dried by the hot air used as a drying heat source. Because of this, it is possible to use the total thermal energy without adding outside air to the hot air, so there is no wastage of thermal energy, and moreover, efficient drying can be achieved using electromagnetic waves that contain a lot of far-infrared rays.

Moreover, since the waste heat generated by heating the substance that emits electromagnetic waves containing a large amount of far infrared rays is also used for grain drying, the thermal energy generated by the heat source can be used without any waste, making it economical.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a grain dryer showing an embodiment of the present invention;
FIG. 2 is a front view of the main parts. ■... Grain dryer, 2... Casing, 3... Packet elevator, 4... Burner, 5... Heat distribution chamber, 6... Induction fan, 7... Inflow air adjustment section , 8・
...Grain storage section, 9...Drying section, lO...Grain collection section,
DESCRIPTION OF SYMBOLS 11... Grain distribution screw, 12... Grain collection/conveyance screw, 13... Hot air path 14... Far-infrared radiator, 15... Inner plate, I6... Outer plate, 17...・Exhaust channel plate, 18...grain flow channel,
19...Lower valve, 20...Exhaust duct. Patent applicant: Biological Industrial Technology Research Promotion Organization

Claims (1)

[Claims] In a grain drying device in which grains to be dried are allowed to flow down and a heat source for drying is provided in the flow path, when heated by the hot air used as the heat source for drying, electromagnetic waves containing a large amount of far infrared rays are emitted. Far-infrared hot air for grains, characterized in that the substance is heated and electromagnetic waves are radiated to dry the grain to be dried, and the exhaust heat from heating the substance is also used for drying the grains. drying equipment.